Organic electroluminescence device and electronic apparatus

ABSTRACT

A organic electroluminescence device includes: a plurality of pixels each including an organic layer and a second electrode in this order on a first electrode having light reflectivity, and each configured to emit light of one wavelength out of two or more different wavelengths, the organic layer including an organic electroluminescence layer; and a black matrix layer provided on light emission side of the second electrode, and having first apertures for the respective pixels. The black matrix layer has inclined surfaces inside the respective first apertures, and inclination angles of the inclined surfaces are set, based on emission wavelengths of the pixels.

CROSS REFERENCES TO RELATED APPLICATIONS

The present Application is a Continuation Application of U.S. patentapplication Ser. No. 15/102,766 filed Jun. 8, 2016, which is a 371National Stage Entry of International Application No.:PCT/JP2014/081988, filed on Dec. 3, 2014, which in turn claims priorityfrom Japanese Application No. 2014-017438, filed on Jan. 31, 2014, theentire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The disclosure relates to an organic electroluminescence device thatemits light with use of an organic electroluminescence (EL) phenomenon,and an electronic apparatus using the organic electroluminescencedevice.

BACKGROUND ART

Organic electroluminescence elements each include an organic layerbetween a lower electrode and an upper electrode. The organic layerincludes an organic electroluminescence layer. Attention has focused onthe organic electroluminescence elements as light-emitting elements thatallow for high-luminance light emission by direct-current driving at lowvoltage.

For an active matrix light-emitting device (organic electroluminescencedevice) using the organic EL elements, there is disclosed technology ofimproving light extraction efficiency by adoption of a so-called anodereflector (refer to Patent Literature 1, for example).

CITATION LIST Patent Literature

Patent Literature 1: Japanese Unexamined Patent Application PublicationNo. 2013-191533

SUMMARY OF INVENTION

The organic electroluminescence device as mentioned above may be usedunder irradiation with intense light in some cases. It is thereforedesired to keep favorable visibility even under such a condition.

It is therefore desirable to provide an organic electroluminescencedevice and an electronic apparatus that make it possible to suppressdeterioration in visibility caused by reflection of outside light.

An organic electroluminescence device according to an embodiment of thedisclosure includes: a plurality of pixels each including an organiclayer and a second electrode in this order on a first electrode havinglight reflectivity, and each configured to emit light of one wavelengthout of two or more different wavelengths, the organic layer including anorganic electroluminescence layer; and a black matrix layer provided onlight emission side of the second electrode, and having first aperturesfor the respective pixels. The black matrix layer has inclined surfacesinside the respective first apertures, and inclination angles of theinclined surfaces are set, based on emission wavelengths of the pixels.

An electronic apparatus according to an embodiment of the disclosureincludes the organic electroluminescence device according to theforegoing embodiment of the disclosure.

In the organic electroluminescence device and the electronic apparatusaccording to the embodiments of the disclosure, the black matrix layerhas the inclined surfaces inside the respective first apertures, and theinclination angles of the inclined surfaces are set, based on theemission wavelengths of the pixels. This makes it possible to have adifferent reflection intensity distribution for each pixel. Rainbow-likecoloring caused by reflection of outside light may be seen due to adifference in diffraction pattern between wavelengths included in theoutside light. However, each of the pixels (each of the wavelengths) hasa different reflection intensity distribution, which makes it possibleto make such coloring unnoticeable.

An organic electroluminescence device according to another embodiment ofthe disclosure includes: a plurality of pixels each including an organiclayer and a second electrode in this order on a first electrode havinglight reflectivity, and each configured to emit light of one wavelengthout of two or more different wavelengths, the organic layer including anorganic electroluminescence layer. Each of the pixels is subdivided intoa plurality of light emission regions, and a formation pattern of thelight emission regions has periodicity corresponding to an emissionwavelength of the pixel.

In the organic electroluminescence device according to anotherembodiment of the disclosure, each of the pixels is subdivided into theplurality of light emission regions, and the formation pattern of theemission regions has periodicity corresponding to the emissionwavelength of the pixel. Rainbow-like coloring caused by reflection ofoutside light may be seen due to a difference in diffraction patternbetween wavelengths included in the outside light. However, theformation pattern of the emission regions of each of the pixels hasperiodicity corresponding to the wavelength, which makes it possible tomake such coloring unnoticeable.

An organic electroluminescence device according to still anotherembodiment of the disclosure includes a plurality of pixels eachincluding an organic layer and a second electrode in this order on firstelectrodes having light reflectivity, and each configured to emit lightof one wavelength out of two or more different wavelengths, the organiclayer including an organic electroluminescence layer, the firstelectrodes being formed for the respective pixels and each having acircular planar shape.

In the organic electroluminescence device according to still anotherembodiment of the disclosure, the first electrodes formed for therespective pixel each have a circular planar shape. Accordingly, outsidelight is less likely to be reflected to one direction (outside light ismore likely to be reflected to all directions), as compared with a casein which the first electrodes each have a rectangular shape.Rainbow-like coloring caused by reflection of outside light may be seendue to a difference in diffraction pattern between wavelengths includedin the outside light. However, reflection directions are dispersed bythe circular shape, which makes such coloring unnoticeable.

According to the organic electroluminescence device and the electronicapparatus of the embodiments of the disclosure, the black matrix layerhas the inclined surfaces inside the first apertures, and theinclination angles of the inclined surfaces are set, based on theemission wavelengths of the pixels, which makes it possible to therainbow-like coloring caused by reflection of outside lightunnoticeable. Accordingly, it is possible to suppress deterioration invisibility due to the reflection of outside light.

According to the organic electroluminescence device of anotherembodiment of the disclosure, each of the pixels is subdivided into theplurality of light emission regions, and the formation pattern of theemission regions has periodicity corresponding to the emissionwavelength of the pixel, which makes it possible to rainbow-likecoloring caused by reflection of outside light unnoticeable.Accordingly, it is possible to suppress deterioration in visibility dueto the reflection of outside light.

According to the organic electroluminescence device of still anotherembodiment of the disclosure, the first electrodes formed for therespective pixels each have the circular planar shape, which makes itpossible to rainbow-like coloring caused by reflection of outside lightunnoticeable. Accordingly, it is possible to suppress deterioration invisibility due to the reflection of outside light.

It is to be noted that the above described contents are merely examplesof the embodiments of the disclosure. Effects of the embodiments of thedisclosure are not limited to effects described here, and may bedifferent from the effects described here or may further include anyother effect.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a functional block diagram of an entire configuration of anorganic electroluminescence device according to a first embodiment ofthe disclosure.

FIG. 2 is a circuit diagram of an example of a pixel circuit illustratedin FIG. 1.

FIG. 3 is a cross-sectional view of a configuration of the organicelectroluminescence device illustrated in FIG. 1.

FIG. 4 is a schematic view for description of a difference in visibilitybetween with and without reflection of outside light.

FIG. 5 is a schematic view for description of rainbow-like coloringcaused by reflection of outside light.

FIG. 6 is a cross-sectional view of a configuration of an organicelectroluminescence device according to a comparative example 1.

FIG. 7 is a diagram of a light application simulation result in thecomparative example 1.

FIG. 8 is a diagram of a light application simulation result in anexample 1.

FIG. 9 is a cross-sectional view of a configuration of an organicelectroluminescence device according to a second embodiment of thedisclosure.

FIG. 10 is a schematic plan view of a configuration of a first electrodeillustrated in FIG. 9.

FIG. 11 is a schematic plan view of a configuration of a first electrodeaccording to a comparative example 2.

FIG. 12 is a diagram of a light application simulation result in thecomparative example 2.

FIG. 13 is a diagram of a light application simulation result in theexample 2.

FIG. 14 is a cross-sectional view and a plan view, where (A) illustratesan organic EL element according to a comparative example 3, and (B)illustrates an organic EL element according to a modification example 1.

FIG. 15 is a characteristic diagram of reflectivity in an example 3 andthe comparative example 3.

FIG. 16 is a cross-sectional view of a configuration of an organic ELelement according to a modification example 2.

FIG. 17 is a schematic view for description of workings of the organicEL element illustrated in FIG. 16.

FIG. 18 is a characteristic diagram of external quantum efficiency in anexample 4 and a comparative example 4.

FIG. 19 is a cross-sectional view of a configuration of an organicelectroluminescence device according to a modification example 3.

FIG. 20 is a diagram of a light application simulation result in anexample 5.

FIG. 21A is a plan view of a rectangular first electrode.

FIG. 21B is a diagram of a planar shape of a first electrode accordingto a modification example 4.

FIG. 22 is a diagram of a light application simulation result in acomparative example 6.

FIG. 23 is a diagram of a light application result in an example 6.

FIG. 24 is a cross-sectional view of a configuration of an organic ELelement according to a modification example 5.

FIG. 25 is a schematic plan view of planar shapes of an aperture and afirst electrode according to a modification example 6.

FIG. 26 is a cross-sectional view of an element configuration accordingto another modification example.

FIG. 27A is a perspective view of an appearance of an applicationexample 1.

FIG. 27B is a perspective view of an appearance of the applicationexample 1.

FIG. 28 is a perspective view of an appearance of an application example2.

FIG. 29A is a perspective view of an appearance of an applicationexample 3.

FIG. 29 is a perspective view of an appearance of the applicationexample 3.

MODE FOR CARRYING OUT THE INVENTION

Some embodiments of the disclosure are described in detail below in thefollowing order with reference to drawings.

1. First Embodiment (An example of an organic electroluminescence devicein which an aperture of a black matrix layer has a predeterminedinclined surface)

2. Second Embodiment (An example of an organic electroluminescencedevice in which a light emission aperture of one pixel is subdivided,and a pattern of the light emission aperture has periodicity)

3. Modification Example 1 (An example in a case in which a firstelectrode has a size equal to or smaller than the light emissionaperture)

4. Modification Example 2 (An example in a case in which a reflectorconfiguration is added)

5. Modification Example 3 (An example of another reflectorconfiguration)

6. Modification Example 4 (An example in a case in which the firstelectrode has a circular planar shape)

7. Modification Example 5 (An example of another reflectorconfiguration)

8. Modification Example 6 (An example in a case in which an aperture ofan insulating film has a circular shape and the first electrode has arectangular planar shape)

9. Application Examples (Examples of electronic apparatuses)

First Embodiment

[Configuration]

FIG. 1 illustrates an entire configuration of an organicelectroluminescence device (an organic electroluminescence device 1)according to a first embodiment of the disclosure. The organicelectroluminescence device 1 may be used as, for example, an organic ELtelevision without limitation. The organic electroluminescence device 1includes pixels 10R, 10G, and 10B in a display region 110A of a drivesubstrate 11. The pixels 10R, 10G, and 10B each include an organic ELelement (an organic EL element 10) to be described later, and aretwo-dimensionally arranged in a matrix. A signal line drive circuit 120and a scanning line drive circuit 130 serving as drivers for imagedisplay are provided around the display region 110A. Note that thepixels are arrayed on the drive substrate 11 along two directions, i.e.,an X direction (for example, a horizontal direction of a display screen)and a Y direction (for example, a vertical direction of the displayscreen). The X direction and the Y direction are orthogonal to eachother.

A pixel circuit 140 is provided in the display region 110A. The pixelcircuit 140 includes the organic EL element 10 that configures the pixel10R, 10G, or 10B. FIG. 2 illustrates an example of the pixel circuit140. The pixel circuit 140 may be, for example, an active circuit. Thepixel circuit 140 may include, for example, a driving transistor Tr1, awriting transistor Tr2, a capacitor (a retention capacitor) Cs, thepixel 10R (or the pixel 10G or the pixel 10B), and the organic ELelement 10. The organic EL element 10 is coupled in series to thedriving transistor Tr1 between a first power supply line (Vcc) and asecond power supply line (GND). Each of the driving transistor Tr1 andthe writing transistor Tr2 may be configured of a typical thin filmtransistor (TFT), and may have, for example, an inverted staggerconfiguration (a so-called bottom gate configuration) or a staggerconfiguration (a top gate configuration).

In the pixel circuit 140, a plurality of signal lines 120A are providedalong a column direction, and a plurality of scanning lines 130A areprovided along a row direction. An intersection of each signal line 120Aand each scanning line 130A corresponds to one (one sub-pixel) of thepixels 10R, 10G, and 10B. Each of the signal lines 120A is coupled tothe signal line drive circuit 120, and an image signal is supplied fromthe signal line drive circuit 120 to a source electrode of the writingtransistor Tr2 through the signal line 120A. Each of the scanning lines130A is coupled to the scanning line drive circuit 130, and a scanningsignal is sequentially supplied from the scanning line drive circuit 130to a gate electrode of the writing transistor Tr2 through the scanningline 130A.

The pixel 10R may be, for example, a pixel that emits red (R) lighthaving a spectrum peak around 600 nm (light of an emission wavelengthcorresponding to red light). The pixel 10G may be, for example, a pixelthat emits green (G) light having a spectrum peak around 530 nm (lightof an emission wavelength corresponding to green light). The pixel 10Bmay be, for example, a pixel that emits blue (B) light having, forexample, a spectrum peak around 450 nm (light of an emission wavelengthcorresponding to blue light). Three pixels 10R, 10G, and 10B (threesub-pixels) that are adjacent to one another configure one pixel. It isto be noted that three pixels of R, G, and B are exemplified here;however, a pixel that emits color light of white (W) or yellow (Y) maybe further provided in addition to these pixels, and a combination offour pixels may configure one pixel. Sizes of the pixels 10R, 10G, and10B may be, for example, but not particularly limited to, 50 μm.

FIG. 3 illustrates a cross-sectional configuration of the organicelectroluminescence device 1. Note that FIG. 3 illustrates only a regioncorresponding to three pixels 10R, 10G, and 10B. In the organicelectroluminescence device 1, for example, light may be extracted by atop emission scheme, and the organic EL element 10 may be formed in eachof the pixels 10R, 10G, and 10B (in each of the pixels) on, for example,the drive substrate 11. The organic EL element 10 includes a firstelectrode 12, an organic layer 14, and a second electrode 15 in orderfrom the drive substrate 11 side. The first electrode 12 is provided ineach of the pixels, and an inter-pixel insulating film 13 is formed onthe first electrodes 12 of all of the pixels. The inter-pixel insulatingfilm 13 has an aperture H2 (a second aperture) that opposes each of thefirst electrodes 12. The organic layer 14 is formed on the firstelectrode 12 in the aperture H2. The second electrode 15 may be soformed over all of the pixels as to cover the inter-pixel insulatingfilm 13 and the organic layer 14, for example.

A sealing substrate 20 is bonded to the second electrode 15 with aprotective film 16 and a sealing resin layer 17 in between. A colorfilter layer 19 and a black matrix layer 18 are formed on one surface (asurface opposing the organic EL element 10) of the sealing substrate 20.

The drive substrate 11 may be configured of a TFT and a wiring layerthat are formed on a substrate made of, for example, glass withoutlimitation. A material of the substrate is not limited to glass, andquartz, metal foil, a resin film, or any other material may be used forthe substrate.

The first electrode 12 is a reflective electrode having lightreflectivity. In a case in which the first electrode 12 functions as ananode, the first electrode 12 may be desirably made of, for example, asimple substance or an alloy of a metal. Examples of the metal mayinclude aluminum (Al), platinum (Pt), gold (Au), silver (Ag), chromium(Cr), tungsten (W), nickel (Ni), copper (Cu), iron (Fe), cobalt (Co),and tantalum (Ta). Examples of the alloy may include an Ag—Pd—Cu alloyand an Al—Nd alloy. The Ag—Pd—Cu alloy may include silver as a maincomponent, 0.3 wt % to 1 wt % of palladium (Pd), and 0.3 wt % to 1 wt %of copper. Alternatively, the first electrode 12 may be a multilayerfilm including a metal film made of one of the metal elements and thealloys as mentioned above and a transparent conductive film made of ITOor any other transparent conductive material. The first electrode 12 maybe desirably made of a material having a high hole injection property;however, even if the first electrode 12 is made of a material (such asaluminum (Al) and an alloy including aluminum) other than the materialhaving a high hole injection property, providing an appropriate holeinjection layer makes it possible to use the first electrode 12 as theanode. Examples of the material of the transparent conductive film mayinclude an oxide of indium and tin (ITO), INZnO (Indium zinc oxide), andan alloy of zinc oxide (ZnO) and aluminum (Al). The first electrode 12may have a thickness of 200 nm, for example.

The inter-pixel insulating film 13 is adapted to define (partition) apixel aperture (a light emission region or a light emission aperture)and to electrically separate the first electrodes 12 from one another.The inter-pixel insulating film 13 may be made of, for example, a resinsuch as an acrylic resin and polyimide.

The organic layer 14 includes an organic electroluminescence layer thatemits color light by occurrence of recombination of electrons and holesin response to application of an electric field. Here, the organic ELelements 10 each are a white light-emitting element. White light emittedfrom each of the organic EL elements 10 passes through the color filterlayer 19 to be separated into color light of R, G, and B. Thus, thecolor light of R, G, and B are emitted. The organic layer 14 mayinclude, for example, a white light-emitting layer that emits whitelight, and may be formed for each of the pixels 10R, 10G, and 10B (foreach of the pixels), or may be formed over all of the pixels. The whitelight-emitting layer may have, for example, a configuration in which ared light-emitting layer, a green light-emitting layer, and a bluelight-emitting layer are stacked, or a configuration in which a bluelight-emitting layer and a yellow light-emitting layer are stacked.However, the configuration of the organic layer 14 is not limitedthereto, and the light-emitting layer may have a different color foreach of the pixels. More specifically, in the pixel 10R, the organiclayer 14 may include a red light-emitting layer. In the pixel 10G, theorganic layer 14 may include a green light-emitting layer. In the pixel10B, the organic layer 14 may include a blue light-emitting layer.Moreover, the organic layer 14 may further include, for example, a holeinjection layer, a hole transport layer, and an electron transport layerin addition to the organic electroluminescence layer. Further, anelectron injection layer or any other layer may be formed between theorganic layer 14 and the second electrode 15. The organic layer 14 mayhave a thickness of about 250 nm, for example.

The second electrode 15 may be configured of a transparent conductivefilm made of a conductive material having a moderate work function andlight transparency. Examples of the conductive material may include ITO(indium tin oxide) and IZO (indium zinc oxide). Another example of thematerial of the second electrode 18 may be an alloy of magnesium andsilver (MgAg alloy). The second electrode 15 may have a thickness ofabout 200 nm, for example.

The protective film 16 may be made of, for example, silicon nitride(SiN), and may have a thickness of about 1.5 μm, for example. Thesealing resin layer 17 may be made of, for example, an epoxy resin, andmay have a thickness of about 4 μm, for example.

The black matrix layer 18 is formed over all of the pixels on lightemission side of the second electrode 15. The black matrix layer 18 hasan aperture H1 (a first aperture) for each of the pixels. In otherwords, the black matrix layer 18 is formed along a region betweenpixels, and may have a lattice pattern as a whole. The black matrixlayer 18 may be made of, for example, a resin or a metal. A specificconfiguration of the black matrix layer 18 will be described later.

The color filter layer 19 is provided adjacent to a surface t2 on lightemission side of the black matrix layer 18. The color filter layer 19includes one of a red filter layer 19R, a green filter layer 19G, and ablue filter layer 19B. Each of the red filter layer 19R, the greenfilter layer 19G, and the blue filter layer 19B opposes correspondingone of the apertures H1 of the black matrix layer 18. The red filterlayer 19R, the green filter layer 19G, and the blue filter layer 19B areso formed as to respectively oppose the aperture H1 of the pixel 10R,the aperture H1 of the pixel 10G, and the aperture of the pixel 10B. Thered filter layer 19R includes a pigment that allows red light to passtherethrough and absorbs light of other wavelengths. The green filterlayer 19G includes a pigment that allows green light to passtherethrough and absorbs light of other wavelengths. The blue filterlayer 19B includes a pigment that allows blue light to pass therethroughand absorbs light of other wavelengths.

The sealing substrate 20 may be made of a material transparent to lightemitted from the pixels 10R, 10G, and 10B, such as glass.

(Specific Configuration of Black Matrix Layer 18)

In the embodiment, the black matrix layer 18 has an inclined surface(inclined surfaces S1 to S3) inside each of the apertures H1. In otherwords, an edge of each of the apertures H1 is inclined, or the blackmatrix layer 18 has a tapered cross-sectional shape in a planeorthogonal to a display screen. These inclined surfaces S1 to S3 eachare inclined in a direction in which the aperture H1 is narrowed from asurface t1 on the organic EL element 10 side to the surface t2 on thelight emission side (on outside light entry side) of the black matrixlayer 18. It is to be noted that a method of forming such inclinedsurfaces S1 to S3 is not specifically limited; however, the inclinedsurfaces S1 to S3 may be formed as follows. When the black matrix layer18 is patterned to form the apertures H1, a pattern of inclined(tapered) surfaces similar to the inclined surfaces S1 to S3 is formedin a photoresist, and etching is performed. This makes it possible totransfer the pattern of the photoresist to the black matrix layer 18.

Inclination angles (inclination angles θ1 to θ3) of the inclinedsurfaces S1 to S3 are set, based on wavelengths of color light emittedfrom the pixels 10R, 10G, and 10B (emission wavelengths of the pixels10R, 10G, and 10B). In other words, the inclination angles θ1 to θ3 areset, based on transmission wavelengths of the color filter layers 19 inrespective pixels. More specifically, the inclination angles θ1 to θ3are set to be larger in a pixel that emits light of a shorterwavelength. Accordingly, in the pixel that emits light of a shorterwavelength, intensity at a pixel end of a reflection intensitydistribution is varied more gently. In a case with the three-pixelconfiguration including three pixels of R, G, and B as with theembodiment, blue light has the shortest wavelength, and wavelengths ofgreen light and red light increase in this order. Accordingly, theinclination angles θ1 to θ3 are so set as to satisfy θ1≤θ2≤θ3. Thereflection intensity distribution is formed, based on magnitudes of theinclination angles θ1 to θ3, and it is therefore possible for the pixels10R, 10G, and 10B to have different reflection intensity distributions.More specifically, reflection intensity of each of the pixels 10R, 10G,and 10B has a distribution in which the reflection intensity has a peakaround a pixel center and decreases toward the pixel end; however,intensity variation (profile shape) at the pixel end of the reflectionintensity distribution is different in each of the pixels 10R, 10G, and10B. In this case, intensity at the pixel end in the reflectionintensity distribution of the pixel 10R that emits red light is abruptlyvaried (the intensity is abruptly decreased at the pixel end), whereasintensity at the pixel end in the reflection intensity distribution ofthe pixel 10G that emits green light is varied more gently than that inthe pixel 10R. Intensity at the pixel end in the reflection intensitydistribution of the pixel 10B that emits blue light of the shortestwavelength is varied more gently than that in the pixel 10G.

The inclination angles θ1 to θ3 each may not necessarily be equal to orlarger than 0°, and one of the inclination angles θ1 to θ3 may be set tobe larger than 0° (the inclination angles θ1 to θ3 may include aninclination angle set to 0°). In an example of FIG. 3, the inclinationangle θ1 in the pixel 10R that emits red light of the longest wavelengthis 0°. In the pixels 10G and 10B, the inclination angles θ2 and θ3 eachare so set as to be larger than 0° and satisfy θ2<θ3. In this example,the inclination angles θ1 to θ3 are set so that the reflection intensitydistributions of green light and blue light follow the reflectionintensity distribution of red light. However, the inclination angles θ1to θ3 are not limited thereto. Even in the pixel 10R, the inclinationangle θ1 may be set to be larger than 0°. Moreover, only the inclinationangle θ3 in the pixel 10B that emits light of the shortest wavelengthmay be so set as to be larger than 0°, and in the pixels 10G and 10R,the inclination angles θ1 and θ2 may be so set as to be θ1=θ2=0°.However, the inclination angles θ1 to θ3 may be desirably set, based onthe emission wavelengths, so as to satisfy θ1<θ2<θ3 as with theembodiment.

In the embodiment, each of the predetermined inclined surfaces S1 to S3is provided in corresponding one of the apertures H1 of the black matrixlayer 18 to form the reflection intensity distribution for each pixel;however, the reflection intensity distribution may be formed by anyother method. For example, transmittance of the sealing resin layer 17,reflectivity of the first electrode 12, or transmittance (absorptance)of the color filter layer 19 (the red filter layer 19R, the green filterlayer 19G, and the blue filter layer 19B) may be so designed as to bevaried in each of the pixels, which makes it possible to form thereflection intensity distribution. As one of the other methods, forexample, a concentration of each of the pigments of the red filter layer19R, the green filter layer 19G, and the blue filter layer 19B in thecolor filter layer 19 may be so adjusted as to increase toward the pixelend, thereby decreasing a gradient of variation of the concentration(making the gradient of variation of the concentration gentler) in orderof B, G, and R. Alternatively, for example, the transmittance of thesealing resin layer 17 may be so adjusted as to decrease toward thepixel end, thereby decreasing a gradient of variation of thetransmittance (making the gradient of variation of the transmittancegentler) in order of the B, G, and R.

Accordingly, it is possible for each pixel to have a differentreflection intensity distribution by forming a transmittancedistribution of the sealing resin layer 17, a reflectivity distributionof the first electrode 12, or a transmittance distribution of the colorfilter layer 19, based on the emission wavelengths. This makes itpossible to achieve effects similar to those in a case in which theinclined surfaces S1 to S3 are provided. Moreover, setting of one ormore of the transmittance distribution of the sealing resin layer 17,the reflectivity distribution of the first electrode 12, and thetransmittance distribution of the color filter layer 19, and setting ofthe inclination angles θ1 to θ3 of the black matrix layer 19 may be usedtogether to form a reflection intensity distribution as described above.

[Workings and Effects]

In the organic electroluminescence device 1 according to the embodiment,when a drive current is supplied to the organic layer 14 through thefirst electrode 12 and the second electrode 15, color light (forexample, white light) generated in the organic electroluminescenceelement 10 passes through the second electrode 15, the protective film16, the sealing resin layer 17, the color filter layer 19, and thesealing substrate 20 to be extracted. Thus, an image is displayed.

The organic electroluminescence device 1 may be used under irradiationwith intense light in some cases. FIGS. 4 and 5 schematically illustratean influence of reflection of outside light on visibility. When anorganic EL panel (an organic EL panel 210) including the organic ELelement 10 as described above is irradiated with outside light L, ablack display region P1 looks black in a case with no reflection ofoutside light (a left diagram of FIG. 4), whereas the black displayregion P1 looks lightly colored (looks whitish) in a case with largereflection of outside light (a right diagram of FIG. 4). It is desirableto reduce reflectivity caused by such reflection of outside light.

In contrast, as illustrated in FIG. 5, in a case in which the organic ELpanel 210 is irradiated with the outside light L, rainbow-like coloringmay be seen due to reflection of outside light, since diffractionpatterns of respective wavelengths (Lr, Lg, and Lb) included in outsidelight are different from one another. Such coloring is easily seen bybringing pixel order close to wavelength order, i.e., by increasingpixel definition. In the embodiment, the black matrix layer 18 has theinclined surfaces S1 to S3 inside the apertures H1, and the inclinationangles θ1 to θ3 are set, based on the emission wavelengths (R, G, and B)of the pixels. It is therefore possible for each of the pixels (each ofthe wavelengths) to have a different reflection intensity distribution.In other words, it is possible to design diffraction patterns forrespective wavelengths to be identical to one another (follow thediffraction pattern of red light in this case), which makes rainbow-likecoloring unnoticeable.

FIG. 6 illustrates a cross-sectional configuration of an organicelectroluminescence device (an organic electroluminescence device 100)according to a comparative example (a comparative example 1) of theembodiment. The organic electroluminescence device 100 includes a firstelectrode 102, an inter-pixel insulating film 103, an organic layer 104,a protective film 105, a sealing resin layer 106, a black matrix layer107, a color filter layer 108, and a sealing substrate 109 on a drivesubstrate 101 as with the embodiment. However, in the black matrix layer107, a surface inside an aperture H100 is not inclined in any of thepixels.

FIG. 7 illustrates a simulation result of application of light (whitelight having a circular cross-sectional shape) to a central region of apanel including the organic electroluminescence device 100 of thecomparative example 1. Note that a right diagram of FIG. 7 is anenlarged view of a region around a center of a left diagram. As can beseen from the simulation result, in the comparative example 1, reflectedlight extends crosswise from the central region of the panel, and arainbow-like color is seen.

FIG. 8 illustrates a simulation result of application of white light toa central region of a panel including the organic electroluminescencedevice 1 according to the embodiment as an example 1, as with theforegoing comparative example 1. Note that a right diagram of FIG. 8 isan enlarged view of a region around a center of a left diagram. As canbe seen from FIG. 8, the color seen in FIG. 7 disappears, and black,white, or gray is seen. Namely, rainbow-like coloring is reduced.

As described above, in the embodiment, the black matrix layer 18 has theinclined surfaces S1 to S3 inside the apertures H1, and the inclinationangles θ1 to θ3 are set, based on the emission wavelengths (R, G, and B)of the pixels 10R, 10G, and 10B. This makes it possible to makerainbow-like coloring caused by reflection of outside lightunnoticeable. Accordingly, it is possible to suppress deterioration invisibility due to reflection of outside light. It is possible tomaintain favorable visibility even under irradiation with intense light.

Next, description is given of embodiments other than the foregoing firstembodiment and modification examples. It is to be noted thatsubstantially same components as those in the foregoing first embodimentare denoted with same reference numerals, and any redundant descriptionthereof is omitted.

Second Embodiment

FIG. 9 illustrates a cross-sectional configuration of an organicelectroluminescence device (an organic electroluminescence device 2)according to a second embodiment. The organic electroluminescence device2 may include, for example, a plurality of pixels 10R, 10G, and 10B eachincluding the organic EL element 10 on the drive substrate 11, as withthe first embodiment. The pixels 10R, 10G, and 10B are arranged in amatrix. Moreover, each of the organic EL elements 10 includes a firstelectrode (a first electrode 12A, 12B, or 12C) provided for each of thepixels, the inter-pixel insulating film 13, the organic layer 14, andthe second electrode 15. The inter-pixel insulating film 13 has theaperture H2 that opposes the first electrode 12A (or the first electrode12B or 12C). The sealing substrate 20 is provided on the secondelectrodes 15 of the organic EL elements 10 with the protective film 16,the sealing resin layer 17, a black matrix layer (a black matrix layer18A), and the color filter layer 19 in between. The black matrix layer18A is made of a material similar to the material of the black matrixlayer 18 in the foregoing first embodiment. The black matrix layer 18Ais so formed as to have an aperture H1 a that opposes each of the pixels10R, 10G, and 10B, and to have a lattice pattern as a whole.

However, in the embodiment, unlike the foregoing first embodiment, theaperture H1 a of the black matrix layer 18A does not have an inclinedsurface. In the embodiment, each of the organic EL elements 10 (each ofthe pixels 10R, 10G, and 10B) further includes a plurality of lightemission regions (light emission apertures) (each of the organic ELelements 10 is divided into a plurality of light emission regions). Aformation pattern of the light emission regions has periodicitycorresponding to each of the emission wavelengths (R, G, and B) of thepixels 10R, 10G, and 10B. In this case, each of the first electrodes 12Ato 12C is subdivided in the aperture H2 to form a plurality of lightemission regions in accordance with the formation pattern.

FIG. 10 schematically illustrates a planar configuration of the firstelectrodes 12A to 12C. Each of the first electrodes 12A, 12B, and 12C isconfigured of a plurality of sub-electrodes (sub-electrodes 12 a 1, 12 b1, and 12 c 1). The sub-electrodes are arranged in a dot pattern(discretely provided). The first electrode 12A, the first electrode 12B,and the first electrode 12C are respectively disposed in the pixel 10B,the pixel 10G, and the pixel 10R. As materials of the first electrodes12A to 12C, a material similar to that of the first electrode 12 in theforegoing first embodiment may be used. In the first electrode 12A, aplurality of sub-electrodes 12 a 1 are discretely provided at equalintervals (with a pitch d1). In the first electrode 12B, a plurality ofsub-electrodes 12 b 1 are discretely provided at equal intervals (with apitch d2). In the first electrode 12C, a plurality of sub-electrodes 12c 1 are discretely provided at equal intervals (with a pitch d3). Aplanar shape of each of the sub-electrodes 12 a 1, 12 b 1, and 12 c 1may be, for example, a circular shape, but may be any other shape (forexample, a square shape or a polygonal shape).

In the first electrodes 12A, 12B, and 12C, the sub-electrodes 12 a 1, 12b 1, and 12 c 1 are so arranged as to have different periodicity. Morespecifically, the pitches d1, d2, and d3 of the sub-electrodes 12 a 1,12 b 1, and 12 c 1 are so designed as to be smaller in a pixel thatemits light of a shorter wavelength. More specifically, the pitches d1,d2, and d3 are so designed as to be linearly varied with the emissionwavelengths. In a case with a three-pixel configuration including threepixels of R, G, and B as with the embodiment, blue light has theshortest wavelength, and wavelengths of green light and red lightincrease in this order. Accordingly, the pitch d1 of the sub-electrodes12 a 1 in the first electrode 12A of the pixel 10B is the smallest. Thepitch d2 of the sub-electrodes 12 b 1 in the first electrode 12B of thepixel 10G is so designed as to be larger than the pitch d1, and thepitch d3 of the sub-electrodes 12 c 1 in the first electrode 12C of thepixel 10R is so designed as to be larger than the pitch d2. In otherwords, the sub-electrodes 12 a 1, 12 b 1, and 12 c 1 are so arranged asto have periodicity that causes the pitches d1, d2, and d3 of thesub-electrodes 12 a 1, 12 b 1, and 12 c 1 to satisfy d1≤d2≤d3. As anexample, since the transmittance peaks of the blue filter layer 19B, thegreen filter layer 19G, and the red filter layer 19R are respectivelyabout 450 nm, about 530 nm, and about 600 nm, it is possible to designthe pitches d1, d2, and d3 so as to satisfy d1:d2:d3=1:1.18:1.33. It isto be noted that the sub-electrodes 12 a 1, 12 b 1, and 12 c 1 havedifferent sizes (areas) in order to secure a substantially equalaperture ratio (aperture area) in the pixels 10R, 10G, and 10B.

In the organic electroluminescence device 2 according to the embodiment,an image is displayed as with the foregoing first embodiment. Moreover,rainbow-like coloring may be seen under irradiation with intense light;however, in the embodiment, each of the pixels is subdivided into aplurality of light emission regions, and the formation pattern of thelight emission regions has periodicity corresponding to each of theemission wavelengths (R, G, and B) of the pixels 10R, 10G, and 10B. Morespecifically, the sub-electrodes 12 a 1 to 12 c 1 of the firstelectrodes 12A to 12C are so arranged as to allow the pitches d1, d2,and d3 to satisfy d1≤d2≤d3.

FIG. 11 illustrates a planar configuration of first electrodes (firstelectrodes 12D) according to a comparative example (a comparativeexample 2) of the embodiment. In the comparative example 2, each of thefirst electrodes 12D provided for the respective pixels 10R, 10G, and10B is configured of a plurality of sub-electrodes 12 d 1 that arearranged with same periodicity. In each of the first electrodes 12D, thesub-electrodes 12 d 1 are arranged at equal intervals (with a pitch d).

FIG. 12 illustrates a simulation result of application of light (whitelight having a circular cross-sectional shape) to a central region of apanel including the first electrodes 12D of the comparative example 2.Moreover, FIG. 13 illustrates a simulation result of application ofwhite light similar to the above white light to a central region of apanel including the first electrodes 12A to 12C of the embodiment as anexample 2. In FIG. 12, rainbow-like coloring is seen. In contrast, ascan be seen from FIG. 13, the color seen in FIG. 12 disappears, andblack, white, or gray is seen. Namely, rainbow-like coloring is reduced.

As described above, in the embodiment, the formation pattern of thelight emission regions of each pixel has periodicity corresponding tothe wavelength, which makes it possible to make rainbow-like coloringunnoticeable. It is therefore possible to achieve effects similar tothose in the foregoing first embodiment.

Modification Example 1

FIG. 14 is a diagram for description of an organic EL element (anorganic EL element 10A) according to a modification example (amodification example 1) of the foregoing first and second embodiments.(A) of FIG. 14 illustrates an element configuration (a configurationcorresponding to the organic EL element 10 of the foregoing firstembodiment) according to a comparative example (a comparative example3). A right diagram illustrates a planar shape of the first electrode 12in a left diagram. (B) of FIG. 14 illustrates a configuration of theorganic EL element 10A, and a right diagram illustrates a planarconfiguration of a first electrode (the first electrode 12D) in a leftdiagram. The configuration of the first electrode 12D in the organic ELelement 10A is different from that in the organic EL element 10according to the foregoing first embodiment, and other configurations ofthe organic EL element 10A is similar to the foregoing organic ELelement 10. It is to be noted that the first electrode 12D is formed foreach of the pixels, and a material of the first electrode 12D is similarto that of the first electrode 12 in the foregoing first embodiment.

In the modification example, the size of the first electrode 12D issubstantially equal to or smaller than a size of the aperture H2 of theinter-pixel insulating film 13. The size of the first electrode 12D isdesigned to be slightly smaller than that of the first electrode 12 by awidth with consideration of a manufacturing margin (a degree of freedomof alignment). A width d5 in one direction of the first electrode 12D isdesigned to be smaller than a width d4 of the first electrode 12.

As described above, the size of the first electrode 12D is designed tobe substantially equal to or smaller than that of the aperture H2, whichmakes it possible to reduce outside light reflectivity. In this case,the first electrode 12D is made of a material having high reflectivity;therefore, reflectivity of visible light is extremely high. Accordingly,if possible, it may be desirable not to form an electrode pattern in aregion that does not emit light, i.e., a region that is not exposed fromthe aperture H2 of the inter-pixel insulating film 13. Designing thesize of the first electrode 12D to be substantially equal to or smallerthan the size of the aperture H2 as with the modification example makesit possible to form the first electrode 12D having a minimum sizecorresponding to the light emission aperture and minimize a regioncontributing to reflection of outside light.

FIG. 15 illustrates reflectivity in an element configuration using thefirst electrode 12 in the comparative example 3 and reflectivity(normalized reflectivity) in an element configuration using the firstelectrode 12D in the modification example as an example 3. In theexample 3, as compared with the comparative example 3, it is possible toreduce an absolute reflection amount by about 30%. Accordingly,application of the configuration of the organic EL element 10A of themodification example to the organic electroluminescence devicesaccording to the foregoing first and second embodiments makes itpossible to reduce the outside light reflectivity (reflection amount)while suppressing rainbow-like coloring caused by reflection of outsidelight, thereby maintaining more favorable visibility.

Modification Example 2

FIG. 16 illustrates a configuration of an organic EL element (an organicEL element 10B) according to a modification example (a modificationexample 2) of the foregoing first and second embodiments. The organic ELelement 10B of the modification example has a reflector configuration (aso-called anode reflector) in a side surface (beside the light emissionaperture) of an aperture (an aperture H2 a) of an insulating film 13A.The insulating film 13A corresponds to the inter-pixel insulating film13 in the foregoing first embodiment. In the modification example, afirst electrode 12E is configured of a plurality of sub-electrodes 12 e1 as with the foregoing second embodiment. The sub-electrodes 12 e 1 arearranged in a dot pattern (discretely provided). Moreover, theinsulating film 13A has a plurality of projections 13 a 1 in across-sectional shape in the aperture H2 a serving as a light emissionaperture of each pixel. In other words, the insulating film 13A includesa plurality of sub-apertures H2 a 1 in the aperture H2 a, and each ofthe sub-apertures H2 a 1 is disposed to oppose corresponding one of thesub-electrodes 12 e 1. In each of the sub-apertures H2 a 1, the organiclayer 14 is exposed, and is in contact with the second electrode 15. Theprotective film 16 is formed along the shapes of the plurality ofprojections 13 a 1. Note that the first electrode 12E is formed for eachof the pixels, and a material of the first electrode 12E is similar tothat of the first electrode 12 in the foregoing first embodiment.

As described above, the organic EL element 10B may include a so-calledanode reflector. This makes it possible to efficiently extract lightemitted from the organic layer 14 as illustrated in FIG. 17. In otherwords, this makes it possible to improve external quantum efficiency. Ascompared with an element configuration without the reflectorconfiguration (a comparative example 4), in an element configuration inthe modification example (an example 4), for example, it is possible toimprove external quantum efficiency by about 2.5 times as illustrated inFIG. 18. In addition, the light emission aperture is subdivided intodots by the projections 13 a 1, which makes it possible to suppressrainbow-like coloring caused by reflection of outside light, as with theforegoing second embodiment. More specifically, for example, thearrangement pitch of the sub-electrodes 12 e 1 is designed, based on theemission wavelength of the pixel, which makes it possible for each pixelto have different periodicity of the formation pattern of the lightemission region even in the modification example. Moreover, applicationof the configuration of the organic EL element 10B in the modificationexample to the organic electroluminescence devices according to theforegoing first and second embodiments makes it possible to improveexternal quantum efficiency while suppressing rainbow-like coloringcaused by reflection of outside light, thereby maintaining morefavorable visibility.

Modification Example 3

FIG. 19 illustrates a configuration of an organic electroluminescencedevice according to a modification example (a modification example 3) ofthe foregoing first and second embodiments. In the foregoingmodification example 2, the light emission region in the pixel issubdivided to form the reflector configuration. However, as with themodification example, a reflector configuration may be formed on a sidesurface of one light emission aperture (an aperture H2 b) in aninter-pixel insulating film 13B. In this modification example, the blackmatrix layer 18 according to the foregoing first embodiment may beprovided, for example.

As described above, the reflector configuration may be provided on theside surface of one aperture H2 b, and even in this case, it is possibleto improve external quantum efficiency as with the foregoingmodification example 2. Moreover, the aperture H1 of the black matrixlayer 18 may have a predetermined inclined surface as with the foregoingfirst embodiment, which makes it possible to make rainbow-like coloringunnoticeable. It is therefore possible to further improve externalquantum efficiency while achieving effects similar to those in theforegoing first embodiment.

FIG. 20 illustrates a simulation result of application of light (whitelight having a circular cross-sectional shape) to a central region of apanel having the black matrix layer 18 and the reflector configurationas mentioned above as an example 5. Although crosswise reflection ofoutside light is seen, coloring is slight. Moreover, it is possible toachieve external quantum efficiency that is about 2.5 times as high asthat in the foregoing first embodiment.

Modification Example 4

FIGS. 21A and 21B are plan views for description of the configuration ofa first electrode according to a modification example (a modificationexample 3) of the foregoing first and second embodiments. FIG. 21Aillustrates a configuration of a first electrode having a typicalrectangular planar shape (an electrode corresponding to the firstelectrode 12 in the foregoing first embodiment) as a comparative example(a comparative example 6). FIG. 21B illustrates a configuration of afirst electrode 12F in the modification example. Note that the firstelectrode 12F is formed for each of the pixels, and a material of thefirst electrode 12D is similar to that of the first electrode 12 in theforegoing first embodiment. Moreover, the “rectangular shape” is notlimited to a precise rectangular shape, and may be a substantiallyrectangular shape. Examples of the rectangular shape may include arectangular shape having a blunt corner caused by a manufacturingprocess, and a side or a corner of the rectangular shape may be rounded.

As illustrated in FIG. 21B, the planar shape of the first electrode 12Fmay be a circular shape. A diameter of the first electrode 12F may beabout 35 μm with respect to a pixel size of 50 μm, for example.Reflection directions are dispersed by such a circular shape, whichmakes rainbow-like coloring unnoticeable. Accordingly, it is possible toachieve effects similar to those in the foregoing first embodiment.Moreover, in a case in which the first electrode 12F has a circularshape as described above, the aperture shape of the aperture H2 of theinter-pixel insulating film 13 may be desirably a circular shape.Further, the size of the first electrode 12F may be desirably equal toor smaller than the size of the aperture H2, which makes it possible toachieve effects similar to those in the foregoing modification example1.

FIG. 22 illustrates a simulation result of application of light (whitelight having a circular cross-sectional shape) to a central region of apanel including the first electrode 12 having a rectangular shape in thecomparative example 6. Moreover, FIG. 23 illustrates a simulation resultof application of white light similar to the above white light to acentral region of a panel including the first electrode 12F having acircular shape in the modification example as an example 6. In FIG. 22,crosswise coloring is seen. As can be seen from FIG. 23, outside lightis not reflected crosswise, and coloring is unnoticeable.

Modification Example 5

FIG. 24 illustrates a cross-sectional configuration of an organic ELelement (an organic EL element 10C) according to a modification example(a modification example 5) of the foregoing first and secondembodiments. In an organic EL element having the anode reflectorconfiguration of the foregoing modification example 2, the firstelectrode 12E is subdivided into dots. However, as with the modificationexample, using an opaque resin layer 13C makes it possible to achievesubstantially similar effects. More specifically, the organic EL element10C has the opaque resin layer 13C including a plurality of projections13 a 1 in the aperture H2 a corresponding to one first electrode 12. Thesecond electrode 15 is so provided as to cover the opaque resin layer13C. The light emission aperture may be subdivided into dots with use ofthe opaque resin layer 13C as with the modification example.

Modification Example 6

FIG. 25 is a schematic view for description of an element configurationaccording to a modification example (a modification example 5) of theforegoing first and second embodiments. The planar shape of the apertureH2 of the inter-pixel insulating film 13 may be a circular shape, andthe planar shape of the first electrode 12 may be a rectangular shape,as with the modification example. At this occasion, the inter-pixelinsulating film 13 may be desirably made of an opaque resin.

In the foregoing embodiments and modification examples, a configurationis illustrated in which the color filter layer 19 and the black matrixlayer 18 (or 18A) are stacked in order from the sealing substrate 20side. Alternatively, as illustrated in FIG. 26, as a BM/CF layer 18B,the red filter layer 19R, the green filter layer 19G, or the blue filterlayer 19B may be formed in the aperture H1 of the black matrix layer.

Application Examples

In the following, description is given of application examples of theorganic electroluminescence devices described in the foregoingembodiments and modification examples. The organic electroluminescencedevices according to the foregoing embodiments are applicable to displaydevices of electronic apparatuses, in any fields, that display an imagesignal inputted from outside or an image signal produced inside as animage or a picture, such as televisions, digital still cameras, notebookpersonal computers, mobile terminal devices such as mobile phones, andvideo cameras. In particular, the organic electroluminescence devicesare suitable for small- and middle-sized mobile displays. Examples ofsuch displays are as follows.

FIGS. 27A and 27B illustrate an appearance of a smartphone 220. Thesmartphone 220 may include, for example, a display section 221 and anoperation section 222 on front side and a camera 223 on rear side. Thedisplay section 221 includes the organic electroluminescence deviceaccording to any of the foregoing embodiments and modification examples.

FIG. 28 illustrates an appearance of a tablet personal computer 240. Thetablet personal computer 240 may include, for example, a touch panelsection 241 and a housing 242. The touch panel section 241 includes theorganic electroluminescence device according to any of the foregoingembodiments and modification examples.

FIGS. 29A and 29B illustrate an appearance of a mobile phone 290. Themobile phone 290 may have a configuration in which, for example, atop-side housing 291 and a bottom-side housing 292 are connectedtogether through a connection section (hinge section) 293. The mobilephone 290 may include a display 294, a sub-display 295, a picture light296, and a camera 297. The display 294 or the sub-display 295 isconfigured of the organic electroluminescence device according to any ofthe foregoing embodiments and modification examples.

Although description has been made by giving the example embodiments andthe examples as mentioned above, the contents of the disclosure are notlimited to the above-mentioned example embodiments and examples and maybe modified in a variety of ways. For example, in the foregoingembodiments and examples, a case in which one pixel is configured ofthree sub-pixels of R, G, and B is exemplified; however, the pixelconfiguration in the disclosure is not limited thereto. Examples of theconfiguration of one pixel may include a four-pixel configuration inwhich one pixel is configured of pixels of R, G, B, and W (white), and afour-pixel configuration in which one pixel is configured of four pixelsof R, G, B, and Y (yellow). In these cases, design change correspondingto the wavelength as mentioned above (such as the inclined surface ofthe black matrix layer or periodicity of the light emission region) isperformed in three pixels of R, G, and B of the four pixels, which makesit possible to improve visibility. Alternatively, in a case in which thedesign change mentioned above is performed on the pixel of W (or thepixel of Y), for example, the pixel of W (or the pixel of Y) may bedesigned in a similar fashion to that of the pixel of G, for example.

Moreover, in the foregoing embodiments and examples, an elementconfiguration that makes it possible to separate white light emittedfrom the organic electroluminescence element into colors with use of thecolor filter is exemplified; however, the disclosure is applicable to anelement configuration without using the color filter.

Further, in the foregoing embodiments and examples, a top emissionorganic electroluminescence device is exemplified; however, thedisclosure is applicable to a bottom emission organicelectroluminescence device as well.

In addition thereto, the material and thickness of each layer, themethod and conditions of forming each layer are not limited to thosedescribed in the foregoing embodiments and examples, and each layer maybe made of any other material with any other thickness by any othermethod under any other conditions.

Further, in the foregoing embodiments, the active matrix display deviceis described; however, the disclosure is applicable to a passive matrixdisplay device. Furthermore, a configuration of a pixel drive circuitfor active matrix drive is not limited to that described in theforegoing embodiments, and may further include a capacitor or atransistor, if necessary. In this case, a necessary drive circuit may beincluded in addition to the signal line drive circuit 120 and thescanning line drive circuit 130 mentioned above in accordance with amodification of the pixel drive circuit. Further, the effects describedin the foregoing embodiments and examples are merely examples, andeffects achieved by the disclosure may be other effects or may furtherinclude other effects.

It is to be noted that the disclosure may include the followingconfigurations.

(1) An organic electroluminescence device including:

a plurality of pixels each including an organic layer and a secondelectrode in this order on a first electrode having light reflectivity,and each configured to emit light of one wavelength out of two or moredifferent wavelengths, the organic layer including an organicelectroluminescence layer; and

a black matrix layer provided on light emission side of the secondelectrode, and having first apertures for the respective pixels, theblack matrix layer having inclined surfaces inside the respective firstapertures, and inclination angles of the inclined surfaces being set,based on emission wavelengths of the pixels.

(2) The organic electroluminescence device according to (1), wherein theinclination angles of the inclined surfaces in a pixel emitting light ofa shorter wavelength of the pixels is set to be larger.

(3) The organic electroluminescence device according to (1) or (2),wherein a reflectivity distribution in the first electrode of each ofthe pixels is set, based on the emission wavelength of the pixel.

(4) The organic electroluminescence device according to any one of (1)to (3), wherein

the pixels are sealed between a first substrate and a second substrate,and a resin layer is provided between the pixels and the secondsubstrate, and

a transmittance distribution in the resin layer in each of the pixels isset, based on the emission wavelength of the pixel.

(5) The organic electroluminescence device according to any one of (1)to (4), further including one or more of color filters each of which isformed corresponding to a selective first aperture of the firstapertures of the black matrix layer,

wherein a transmittance distribution in the color filter of each of thepixels is set, based on the emission wavelength of the pixel.

(6) The organic electroluminescence device according to any one of (1)to (5), wherein, in a pixel emitting light of a shorter wavelength outof the pixels, intensity at a pixel end of a reflection intensitydistribution is set to be varied more gently.

(7) The organic electroluminescence device according to any one of (1)to (6), further including an insulating film,

wherein the first electrode comprises a plurality of first electrodesformed for the respective pixels,

the insulating film has second apertures that oppose the respectivefirst electrodes, and

a size of each of the first electrodes is equal to or smaller than asize of each of the second apertures.

(8) The organic electroluminescence device according to any one of (1)to (7), further including an insulating film,

wherein the first electrode comprises a plurality of first electrodesformed for the respective pixels,

the insulating film has second apertures that oppose the respectivefirst electrodes, and

a reflector configuration is provided on a side surface of each of thesecond apertures.

(9) The organic electroluminescence device according to (8), whereineach of the first electrodes is configured of a plurality of sub-pixelsthat are discretely provided

(10) The organic electroluminescence device according to any one of (1)to (9), wherein

the first electrode comprises first electrodes formed for the respectivepixels, and

each of the first electrodes has a circular planar shape.

(11) The organic electroluminescence device according to any one of (1)to (10), wherein the pixels include a pixel that emits one of red light,green light, and blue light.

(12) The organic electroluminescence device according to (11), whereinthe plurality of pixels further include a pixel that emits white light.

(13) An organic electroluminescence device including a plurality ofpixels each including an organic layer and a second electrode in thisorder on a first electrode having light reflectivity, and eachconfigured to emit light of one wavelength out of two or more differentwavelengths, the organic layer including an organic electroluminescencelayer,

wherein each of the pixels is subdivided into a plurality of lightemission regions, and a formation pattern of the light emission regionshas periodicity corresponding to an emission wavelength of the pixel.

(14) The organic electroluminescence device according to (13), wherein

the first electrode comprises first electrodes formed for the respectivepixels,

each of the first electrodes are configured of a plurality ofsub-electrodes discretely provided, and

the light emission regions are formed in each of the pixels inaccordance with a formation pattern of the sub-electrodes.

(15) The organic electroluminescence device according to (14), whereinan arrangement pitch of the sub-electrodes is set to be smaller in apixel that emits light of a shorter wavelength of the pixels.

(16) The organic electroluminescence device according to any one of (13)to (15), further comprising an insulating film,

wherein the first electrode comprises a plurality of first electrodesformed for the respective pixels,

the insulating film has second apertures that oppose the respectivefirst electrodes, and

a size of each of the first electrodes is equal to or smaller than asize of each of the second apertures.

(17) The organic electroluminescence device according to any one of (13)to (15), further including an insulating film,

wherein the first electrode comprises a plurality of first electrodesformed for the respective pixels,

the insulating film has second apertures that oppose the respectivefirst electrodes, and

a reflector configuration is provided on a side surface of each of thesecond apertures.

(18) An organic electroluminescence device including a plurality ofpixels each including an organic layer and a second electrode in thisorder on first electrodes having light reflectivity, and each configuredto emit light of one wavelength out of two or more differentwavelengths, the organic layer including an organic electroluminescencelayer, the first electrodes being formed for the respective pixels andeach having a circular planar shape.

(19) The organic electroluminescence device according to (18), furthercomprising an insulating film having second apertures that oppose therespective first electrodes and each having a circular shape.

(20) An electronic apparatus provided with an organicelectroluminescence device, the organic electroluminescence deviceincluding:

a plurality of pixels each including an organic layer and a secondelectrode in this order on a first electrode having light reflectivity,and each configured to emit light of one wavelength out of two or moredifferent wavelengths, the organic layer including an organicelectroluminescence layer; and

a black matrix layer provided on light emission side of the secondelectrode, and having first apertures for the respective pixels, theblack matrix layer having inclined surfaces inside the respective firstapertures, and inclination angles of the inclined surfaces being set,based on emission wavelengths of the pixels.

This application claims the benefit of Japanese Priority PatentApplication No. JP 2014-017438 filed in the Japan patent office on Jan.31, 2014, the entire contents of which are incorporated herein byreference.

It should be understood by those skilled in the art that variousmodifications, combinations, sub-combinations and alterations may occurdepending on design requirements and other factors insofar as they arewithin the scope of the appended claims or the equivalents thereof.

The invention claimed is:
 1. An organic electroluminescence devicecomprising: a plurality of pixels respectively configured to emit light,each respective pixel including a first electrode, a second electrode,an organic layer, and a color filter, wherein the first electrode haslight reflectivity and the organic layer includes an organicelectroluminescence layer and is located between the first and secondelectrodes; and light shielding portions arranged on a light emissionside of the organic layer, the light shielding portions respectivelyincluding inclined surfaces that respectively have a plurality ofinclination angles, wherein the plurality of inclination angles aredifferent inclination angles that are set based upon different emissionwavelengths of each respective pixel.
 2. The organic electroluminescencedevice according to claim 1, wherein the pixels are sealed between afirst substrate and a second substrate, and a resin layer is providedbetween the pixels and the second substrate, and a transmittancedistribution in the resin layer is set based upon the different emissionwavelengths of each respective pixel.
 3. The organic electroluminescencedevice according to claim 2, wherein for each respective pixel, aboundary of the color filter overlaps a corresponding one of the lightshielding portions.
 4. The organic electroluminescence device accordingto claim 3, wherein for each of the pixels, the first electrode iscomposed of a plurality of sub-electrodes that are discretely arranged.5. The organic electroluminescence device according to claim 4, whereinthe pixels are respectively configured to emit red light, green light,and blue light.
 6. The organic electroluminescence device according toclaim 4, wherein the pixels are respectively configured to emit redlight, green light, blue light and white light.
 7. An electronicapparatus provided with an organic electroluminescence device, theorganic electroluminescence device comprising: a plurality of pixelsrespectively configured to emit light, each respective pixel including afirst electrode, a second electrode, an organic layer, and a colorfilter, wherein the first electrode has light reflectivity and theorganic layer includes an organic electroluminescence layer and islocated between the first and second electrodes; and light shieldingportions arranged on a light emission side of the organic layer, thelight shielding portions respectively including inclined surfaces thatrespectively have a plurality of inclination angles, wherein theplurality of inclination angles are different inclination angles thatare set based upon different emission wavelengths of each respectivepixel.
 8. The electronic apparatus according to claim 7, wherein thepixels are sealed between a first substrate and a second substrate, anda resin layer is provided between the pixels and the second substrate,and a transmittance distribution in the resin layer is set based uponthe different emission wavelengths of each respective pixel.
 9. Theelectronic apparatus according to claim 8, wherein for each respectivepixel, a boundary of the color filter overlaps a corresponding one ofthe light shielding portions.
 10. The electronic apparatus according toclaim 9, wherein for each of the pixels, the first electrode is composedof a plurality of sub-electrodes that are discretely arranged.
 11. Theelectronic apparatus according to claim 10, wherein the pixels arerespectively configured to emit red light, green light, and blue light.12. The electronic apparatus according to claim 10, wherein the pixelsare respectively configured to emit red light, green light, blue lightand white light.